airy vs hairline

airy

adj
  • Resembling air; thin; unsubstantial; not material; airlike. 

  • light-hearted; vivacious 

  • Having the light and aerial tints true to nature. 

  • an airy situation 

  • Spacious, well lit, well ventilated. 

  • Relating or belonging to air; high in air; aerial. 

  • Consisting of air. 

  • Not based on reality; having no solid foundation 

  • Having an affected manner; being in the habit of putting on airs; affectedly grand. 

  • Relating to the spirit or soul; delicate; graceful. 

  • Open to a free current of air; exposed to the air; breezy. 

hairline

adj
  • very thin, as thin as a hair 

noun
  • A fishing line made from hair. 

  • The line along one's forehead where hair starts growing. 

  • A very thin line in writing, drawing, or typography. 

  • A very thin fissure. 

How often have the words airy and hairline occurred in a corpus of books? (source: Google Ngram Viewer )